Spring isa flourishing season. When the rosa rugosas are in full bloom, it is time to make wine. Rosa rugosa (also known as rugosa rose, Japanese rose, or Ramanas rose), a species of rose from the ancient time, is a rare plant in Xiaolan Town where people still observe the tradition of making rosa rugosa wine in March or April.

Rosa rugosa has a narrow comfort zone and can survive only when planted in ideal soil and with ideal temperature. With a short flowering period and buds withering easily if struck by a rainstorm, Rosa rugosa needs to be picked quickly in March or April when in blossom.